Setting unkown timezone property?

[smockensturm]

Throwing this error in the control panel when adding a date exception, THEN saving the entry.

Setting unknown property: craft\behaviors\CustomFieldBehavior::timezones

Removing any date exceptions removes this error and allows us to save the entry.

We are using Calendarize inside a Super Table
Craft Pro 3.4.5
PHP 7.1.16
MySQL 5.5.5
MariaDB 10.1.32

[spoeken]

I'm experiencing that dates chosen show up as different dates than intended as well, and some days display undefined as the day of the date in the list.